Nut-lock.



n. 1. now.

HUT LOOK.

PLIOATIOI [11.31) I. 10, 1012.

1,039,710. Patented 0.01. 1,1912.

Min. j o h mummmwmgg.

UNITED STATES PATENT OFFICE.

nnwm A. DOTY, or ALB NY, new 'ronx.

NUT-LOOK.

Specification of Letters Patent.

To all "whom it may concern: I

Be it'known that I, EDWIN A. Do'rY, a citizen of the United States, residing at Albany,in the county-of Albany'and State 'of New York, have invented certain new and useful Improvements in Nut Locks, of which the following is a' specification.

My. invention relates to nut-locks and the object of myinvention is to construct a one piece nut lock 'made to comply with threads of the bolt and enga e in the metal bolt itself between the threads, so as not to,

- injure the threads of the bolt, and so constructed that the nut-lock may contain one or more points to impinge into the metal bolt between the threads and bind upon the bottom and sides of the threads in such a manner as to prevent said nut-lock from turning backward. I obtain this objectby means of the nut-lock constructed as shown in, the accompanying drawings in which- Figure l is a top plan view of my nut-lock. Fig. 2 is a vertical side elevation. Fig.3 is a section on line a, a, Fig. 1. Fig. 4 is a horizontal side elevation. Fig. 5 is a per-- spective. view of. a bolt and my nut-lock locking a nut thereon.

Similar numeralsrefer to similar parts throughoutthe several views.

On September 4,1906, Letters Patent of the United States No. 830,055, were issued to me for nut-lock and on October. 29, 1907, Letters ratent of the United States No. 869,696, were issued to me for nut-lock which was an improvement upon my former 'invention f inner edge of the circumference of the bolt hole somewhat in a spiral form, thereby shaping it"in the form of a thread, to followthe thread of the'bolt in screwing the nutlock on the bolt. The same operation also stamps out a folding point arranged to impinge the body of the bolt itself betweenthe screw threads so as not to interfere with or injure thescrew threads but. to leave the screw threads perfectly smooth after the 'nutdock which is preferably made of thin PatentedOct.1,1912. Application filed January 19, 1912. Serial No. 672,217. I

sheet metal which may be stamped out in the size and shape desired.

1 is an elongated arm extending from the side of the nut-lock having a sharp point and bent over so as to follow the threads of.

the bolt when the nut-lock'is screwed upon the bolt in contact with the holding nut.

There may be one or more of these points. When thenut-lock is screwed upon the bolt until it comes in contact with the holding .nutthe points will be next to the body of the bolt between the threads and maybe impinged in the bolt itself by sharp taps of a. hammer and become more or less indented in the bolt so as to assist in holding the nutsecurely at that place and prevent any movement of the nut backward toward the end of the bolt. Also stamped from the sheet metal in making the nut-lock is the tongue 2 formed by the slot or cut :3.

In stamping'out the nut-lock and making the cut or slot 3 the inner edge of the eircumference of the bolt hole with thetongue 2 is slightly bent in spiral form as shown in I Figs. 2,3 and 4 so as to follow .thescrew threads of the bolt' and thus dispense with any screw threads upon the nut-lock. The said tongue 2 is adapted to follow betweenthe threads and press against the body of the bolt, thus acting somewhat as a pawl in the grooves of the bolt thread to prevent the nut-lock'from turning backward. f There. may be one or more of these tongues as.

desired and so bent as to fit the sizes of:

screw threads oft-he bolt upon which. it is" designed to -be-used. The tongues '2 are sprung upwardly for a left hand sorew thread and downwardly fora right hand' screw thread. The nut-lock naybe i eadily screwed upon the bolt and come-iii contactwith the holding nut upon the bolt, making a very economical and etfective .wa of securing the nut-lock upon the holding bolt and holding the nut upon the bolt. As thus constructed my. nutr'lock is an improvement of the nut-lock shown and described in the former patents.- It ismore cheaply made and more effective and satisfactory in use than my former nut-locks. The point 1- .fo'lthe screw threads and impinging .in one bodyof the nut-"lock tegether with the spiral form of the inner e ges of the circumference of the bolt hole acts as a screw thread in the nut-lock when placi the nut-lock upon the bolt and when screwe down close against the holding nut/operates to tilt the nut-lock' much the same as the lug E in my Patent No. 869,696, above referred'tm I The labor of cuttingor-tapping threads in the nut-lock is avoided by the body of the nut-lock being made from sheet. metal iece of roper thickness tofit betweent e thread; of the bolt. The inner edge of the circumference of the bolt hole ismade with one or more cuts or slots to allow-it to be sprung into a spiral or screwform to fit between the threads of the bolt,

and cause pressure to bear upon the threads of the bolt by the resiliency of the nut-lock. Thus a cutting ed e is formed at the beand end 0 the circlesurrounding e bo t' .hole. This cutting edge will cut into the side of the thread of the bolt and into thebolt itself. The point 2 impinges the body of the bolt back of the center of the bolt and presses a inst the bolt and is' held in this position y the resiliency of the nut-lock as above described and tends to. hold the nut-lock from turning backward and thus holds the holding nut in I 81' htex nse. 35,

position upon' the bolt and makes a very serviceable and useful nut-lock at a very at. claim as m invention and desire to secureby Letters atent is,

.1. A nut-lock consisting of a locking nut stamped from sheet metal, a slot stamped therein forming a tongue at an an le with the body of the locking nut and WhlCh with the inner edge of the circumference of the bolt hole is arranged and adapted to follow the screw threads on the bolt and come in contact with the top surface of the holding nut and hold said lock-nut in a tilted position with a spring pressure, and an elongated arm to said locking nut onjfthe side thereof, said elongated arm forming a sharppoint. t

2. Ina nut-lock means for lockingthe tongue formed by said cut be' nut by a locking nut formed from thin metal the inner edge'of the circular bolt hole having a slot cut therein, a tongue formed by said slot, said tongue being bent,

from-the plane of the surface of the body of the nut-lock and adapted to follow be tween the threads and press against the body of the bolt and acting as a pawl and adapted to prevent the locking-nut from turning backward.

8. A nut-lock formed from thin metal, the inner edge of the circumference of the bolt hole having a slot cut therein, the bent from the lane of the surface of the of the nutock, said inner edge being Iomewhatspiral in form, forming a toggle at the beginning of the s iral, and pted 'Io folow the thread 0 a bolt, and \n elo ted arm on the outer edgedof saild nut-lock orming a s arp point a apte to impinge in the body of the bolt between the screw threads, said tongue projecting backward allowing the nut-lock to be turned forward to take up slack space caused by the elongation of the bolt under tension.

4. A nut-lock formed from thin metal, the inner edge of the circular bolt hole having a sloticut therein, the tongue formed by said cut being bent from the plane of the surface of the body of the nut-lock, said inner edge being somewhat spiral in form. forming a cuttin edge at the beginning of the spiral and a apted to follow the thread,

EDWIN A. DOTY.

\Vitnesses:

WALTER E. WARD, Rma VAN DER VOLGEN. 

